i know this is old but i just got one of these hub that had the same problem. it is the index spring. to get mine working i simply bent the end of the index spring out so that the tip made better contact with the splines inside the first clutch (it was a good few mm shorter than it used to be) it would probably be best to get a new spring but that would require a lot of effort to source as they are quite hard to come by

I have rebuilt many Bendix red, yellow and blue band hubs. I live in Australia and have purchased a lot of Bendix spare parts from USA vintage bike shops and have developed a lot of contacts for parts. If any one is after refurbished Bendix 2 speeds or even new hubs stripped and re greased, drop me a line on walshfamily@westnet.com.au. I can give advise on repairing your own if needed SHLAW64

Hi I was told this is possible and I can’t see why not. You can get them off ebay. I have a 3 speed throttle type , very old school They are like a motor bike accelerator, so you change gears from handle bars, Its $60 thanks Kevin

THANKS KEVIN . I’LL KEEP THAT IN MIND . I REALLY WOULD LIKE THE MODEL I CAN PUT ON THE FRAME ” SUICIDE ” STYLE .THEY COME IN A BLACK COLOUR AND WERE USED IN THE 60’s .”BETTY” , MY SCHWINN PANTHER WOULD FEEL MUCH SLIMMER AND READY TO GET OUT ON THE DANCE FLOOR !! THANKS AGAIN …ADZEE .

Kevin, I have a red band hub,it shifts and operates grate in both gears, only one exception is in low gear it slips if I stand up to power pedal but while pedaling siting on level ground it works great. What do you figure is wrong, my Wife”s yellow band doesn’t do it, I figure this will only get worse as time goes by. Do you sell the parts it might need?
Leonce

Hi Andy , It will come with a sprocket, !8 tooth . I can do you a fully refurbished red band for $160 shipped to USA . Payment through pay pal . Ive sent them all over the place with no problems . Thanks Kevin